Look up: Informal

1. 
   informal
   [Adjective] Relaxed, not sticking to rules or formalities of dress or language.
   Example: The college interview was very informal and students were encouraged to ask questions.
   Found on http://www.bbc.co.uk/skillswise/glossary
   
   
2. 
   informal
   [adj] - not officially recognized or controlled 2. [adj] - used of spoken and written language 3. [adj] - not formal
   Found on http://www.webdictionary.co.uk/definitio
   
   
3. 
   informal
   activities which differ little, if at all, from official recognised occupational employment, but for which no financial gain is received in return and to which labour law and social security legislation are not applicable, such as household tasks and voluntary wok...; 2)paid work which workers and employers deliberately keep outside the official framework.. Category: Medicine • busines...
   Found on http://www.mijnwoordenboek.nl/definition
   
   
4. 
   Informal
   Definition (keystage 3) An informal proof is not logically sound; it may have gaps and it may be more to do with making something look convincing or explaining something, than with actually proving it.<br /> The opposite of informal is formal or rigorous.
   Found on http://thesaurus.maths.org/mmkb/entry.ht
   
   
5. 
   Informal
   In·form'al adjective [ Prefix in- not + formal .] 1. Not in the regular, usual, or established form; not according to official, conventional, prescribed, or customary forms or rules; irregular; hence, without ceremony; as, an informal writing, proceeding, or visit. 2. Deranged in mind; out of one's senses. [ Obsolete] « These poor informal women.&# ...
   Found on http://www.encyclo.co.uk/webster/I/56
   
   
6. 
   informal
   1. Not in the regular, usual, or established form; not according to official, conventional, prescribed, or customary forms or rules; irregular; hence, without ceremony; as, an informal writting, proceeding, or visit. ... 2. Deranged in mind; out of one's senses. 'These poor informal women.' (Shak) ... Origin: Pref. In- not + formal. ... Source: Webste ...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
7. 
   informal
   loose adjective not officially recognized or controlled; `an informal agreement`; `a loose organization of the local farmers`
   Found on http://wordnet.princeton.edu/perl/webwn?
   
   
8. 
   Informal
   • (a.) Not in the regular, usual, or established form; not according to official, conventional, prescribed, or customary forms or rules; irregular; hence, without ceremony; as, an informal writting, proceeding, or visit. • (a.) Deranged in mind; out of one`s senses.
   Found on http://thinkexist.com/dictionary/meaning